Spacewalks require bravery and skill.
Meaning: Astronauts need to be brave and skilled to do activities outside their spacecraft in space.
Choice of Words: Spacewalks are activities done by astronauts outside a spacecraft in space. Require means to need something. Bravery means courage. Skill means the ability to do something well. Spacewalks need astronauts to be brave and have the skills to work in space.
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